217632848066 has 8 divisors (see below), whose sum is σ = 340642718784. Its totient is φ = 104085275140.

The previous prime is 217632848047. The next prime is 217632848087. The reversal of 217632848066 is 660848236712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 217632847999 and 217632848017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365574390 + ... + 2365574481.

It is an arithmetic number, because the mean of its divisors is an integer number (42580339848).

Almost surely, 2^217632848066 is an apocalyptic number.

217632848066 is a deficient number, since it is larger than the sum of its proper divisors (123009870718).

217632848066 is a wasteful number, since it uses less digits than its factorization.

217632848066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731148896.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 217632848066 in words is "two hundred seventeen billion, six hundred thirty-two million, eight hundred forty-eight thousand, sixty-six".